METHOD FOR DIGITAL-TO-ANALOGUE CONVERSION Russian patent published in 2011 - IPC H03M1/66 

FIELD: information technology.

SUBSTANCE: in the method for digital-to-analogue conversion, comprising reception of a pulsed PWM signal whose period is determined by the length of the converted code and frequency of the main oscillator, and the pulse ratio is inversely proportional to the converted code, normalisation of the amplitude of the obtained signal and subsequent filtration thereof in the low-frequency region, before filtration, the PWM signal is further amplitude modulated by an amplitude-normalised square modulated signal at the frequency of the main oscillator, wherein in one of the half-periods of the modulated signal on the information interval of conversion, the previous value of intermediate conversion is recorded.

EFFECT: shorter conversion time while maintaining accuracy.

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